exists and is an alternate of . Since this is regarding statistics I assume you mean lower case sigma (Ï) which, in statistics, is the symbol used for standard deviation, and Ï2 is known as the variance.
The Acceptable Quality Limit, commonly referred to as AQL, is a method widely used to measure a production order sample to find whether or not the entire product order has met the client's specifications. The customer then has the data to make an informed decision to accept or reject the lot.
âAQLâ stands for âAcceptance Quality Limitâ, and is defined as the âquality level that is the worst tolerableâ in ISO 2859-1. It decides on the maximum number of defective units, beyond which a batch is rejected. Importers usually set different AQLs for critical, major, and minor defects.